Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8795b5d77a02b73612b1ec6e8637d365bbfd0e48f4f753dcd268c2b10fe775b5' 
  AND token = '6LmpMnKnqYv1C9UmGC4T7Q+epNv2TxeJclwcMGb0cfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}